This is the rocket that literally lights itself on fire before it heads to space. It’s the world’s largest rocket entirely fueled by liquid hydrogen, a propellant that is vexing to handle but ...

Thursday’s launch has been scrubbed. Officials said they will make another attempt to launch the rocket at 1:37 p.m. Friday. The rocket will carry the NROL-70 mission for the National Reconnaissance ...

At 2:47 p.m. EDT Thursday, March 28, ULA called a scrub. Previously, it was scheduled for 2:45 p.m. EDT, 1:40 p.m. EDT and 2:03 p.m. EDT. Next attempt is TBD. The Delta IV Heavy rocket, which had been ...

Delta IV Heavy rocket has 3 Delta IV core stages. Each rocket engine produces up to 702,000 pounds of thrust. The engines aren't small: Just one engine weighs about 14,876 pounds and is 17 feet in ...